Timbers – 5" and larger

10x12

Standard: DOC PS 20 / NDS SupplementSource: Nominal − ½" (green), calculated
xyb = 9.5d = 11.5
Cross-section, to scaledimensions in inches

Dimensions

Depthd
11.5in
Widthb
9.5in

Mass and area

Cross-sectional areaA
109.2in²
Outside perimeterP
42in

Strong axis x–x

Moment of inertiaIx
1,204in⁴
Elastic section modulusSx
209.4in³
Plastic section modulusZx
314.1in³
Radius of gyrationrx
3.32in

Weak axis y–y

Moment of inertiaIy
821.7in⁴
Elastic section modulusSy
173in³
Plastic section modulusZy
259.5in³
Radius of gyrationry
2.742in

Torsion and stability

Torsional constantJ
1,643in⁴

Equivalents in other standards